Effect of feedstock diamond powder property on microstructure and mechanical properties of polycrystalline diamond compacts

Ni, Peishen; Zhao, Zhe; Yang, Wei; Deng, Xin; Wu, Shanghua; Qu, Zhi; Feng, Jiashi

doi:10.1016/j.ijrmhm.2023.106102

Cited by 3 publications

(5 citation statements)

References 34 publications

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“…The median particle size D50 of the diamond powder is 11µm. The feedstock diamond powder used in this study is the same batch of the regular diamond powder used in [15]. The average particle size of Co powder in this study (Shanghai ST-Nano Material Technology Co., Ltd., Shanghai, China) is 1µm, and the purity is 99.9%.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…Crystals 2023, 13, x FOR PEER REVIEW same batch of the regular diamond powder used in [15]. The average particle powder in this study (Shanghai ST-Nano Material Technology Co., Ltd. Shangh is 1µm, and the purity is 99.9%.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…The sintering temperature was 1580°C and pressure was 5.5 GPa. The encapsulation and HPHT processes used in this study are similar to those adopted in [15,23]. The selection of sintering temperature and pressure is to ensure the melting of Co and the thermal stability of diamond during the HPHT process.…”

Section: Hpht Processmentioning

confidence: 99%

“…and the feedstock diamond powder morphology [15]. The existence of residual stress will have a significant impact on the thermal stability of PDCs.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al [25] added graphene to feedstock diamond powder and found that the residual stress of a PCD layer was significantly reduced. Peishen et al [15] showed that feedstock diamond powder morphology had a significant effect on the residual stress of PDCs, and the higher specific surface area of diamond powder led to higher compressive stress of a PCD layer.…”

Section: Introductionmentioning

confidence: 99%

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Research on Microstructure, Synthesis Mechanisms, and Residual Stress Evolution of Polycrystalline Diamond Compacts

Ni,

Chen,

Yang

et al. 2023

Crystals

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The microstructure and residual stress of polycrystalline diamond compact (PDC) play crucial roles in the performance of PDCs. Currently, in-depth research is still to be desired on the evolution mechanisms of microstructure and residual stress during high pressure high temperature (HPHT) synthesis process of PDCs. This study systematically investigated the influencing mechanisms of polycrystalline diamond (PCD) layer material design, especially the Co content of the PCD layer, on microstructure and residual stress evolution in PDCs via Raman spectroscopy and finite element micromechanical simulation. The research shows that when the original Co content of the PCD layer is higher than 15 wt.%, the extra Co in the PCD layer will migrate backwards towards the carbide substrate and form Co-enrichment regions at the PCD–carbide substrate interface. As the original Co content of the PCD layer increases from 13 to 20 wt.%, the residual compressive stress of diamond phase at the upper surface center of the PCD layer gradually decreases and transforms into tensile stress. When the original Co content of the PCD layer is as high as 30 wt.%, the residual stress transforms back into significant compressive stress again. The microstructure-based micromechanical simulation at the PCD–carbide substrate interface shows that the Co-enrichment region is the key for the transformation of the residual stress of the diamond phase from tensile stress into significant compressive stress.

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Section: Experimental Materialsmentioning

confidence: 99%

Section: Experimental Materialsmentioning

confidence: 99%

Section: Hpht Processmentioning

confidence: 99%

“…and the feedstock diamond powder morphology [15]. The existence of residual stress will have a significant impact on the thermal stability of PDCs.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations